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C1 and C7 pinout diagrams

Jclark316

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I have a 19 Ram Laramie 1500. Does anybody have a diagram for the C1 and C7 pinouts? My hazard/warning lights are not working when I press the switch on the dash. The dealership cannot find the issue. I installed the factory bed lighting kit per instructions, had the dealership flash the code in, and have them working just fine. During the bed lights install, I had to change the pins in C1 and C7 per instructions. It is the only thing electrical work that has been done to the truck since purchasing in January of '19. I'm wanting to rule out the C1 and C7s from, being the issue of the problem. Thanks.
 

Jclark316

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I did not discover the hazard/warning lights not working months after I installed the bed lighting kit. This is the reason I do not know if the two are connected issues. I'm really hoping they are not.
 

TBurton

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The Mopar bed lights kit 8221527AB instructions have a error on plug C7. The call out for Pin 16 is in the wrong position. That pin is actually the Hazard sense wire.
1575850159680.png
 

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  • BCM C1_A.pdf
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Jclark316

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The Mopar bed lights kit 8221527AB instructions have a error on plug C7. The call out for Pin 16 is in the wrong position. That pin is actually the Hazard sense wire.
View attachment 41408
Thanks TBurton. That makes sense as to why the Hazards are not working. I will try swapping the pin locations and hopefully that will work.
 

TBurton

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If Hazard sense wire was removed from pin 21 it should be taped to the harness. Look for the WH/DB wire and reinsert to pin 21.

The wire for the LED bed lights in pin 16 is BG/VT.

View looking at wire insertion side C7 (G)

page2image1770464
 
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Jclark316

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Update: I changed the pins to the new locations and everything functions perfectly. Thanks T. Burton for the info. Problem solved!
 

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